/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/PartyBeaconClient.h
** This version is for existing / established connections only, it will not actually attempt a connection **
true if the request able to be sent, false if it failed to send
virtual bool RequestReservationUpdate ( const [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) & RequestingPartyLeader, const [TArray](API\Runtime\Core\Containers\TArray)< [FPlayerReservation](API\Plugins\OnlineSubsystemUtils\FPlayerReservation) > & PlayersToAdd, bool bRemovePlayers )